2. 职称英语
  3. Many people imagine that Alzheimer’s disease (早老性痴呆病), the degenerative diso

Many people imagine that Alzheimer’s disease (早老性痴呆病), the degenerative diso

游客2023-09-12  67
问题     Many people imagine that Alzheimer’s disease (早老性痴呆病), the degenerative disorder that ultimately leaves sufferers with total memory loss, is an inevitable result of aging. This is not so.  【C1】______ the risks of contracting the disease increase with age, there are many elderly people【C2】______ memories are perfect. Most of us are so ill-【C3】______ about all forms of memory loss that we label everything as "Alzheimer’s’. Alzheimer’s disease itself can【C4】______ people as young as 30 and can progress either quickly or slowly. It can also【C5】______ the blame for other non-degenerative conditions such as deep depression.【C6】______ , only an examination of the brain tissue during an autopsy (解剖) can produce an accurate【C7】______ of the disease.
    The causes of Alzheimer’s are unknown. They may be either【C8】______ or environmental. A study in 1996 of 13,000 people whose parents or siblings had the disease showed they had five times【C9】______ chance of succumbing  【C10】______ the age of 80 than those with no family【C11】______ of the problem.
    There are other factors, however. In a study of identical twins, it was found that only about half of the twin pairs developed Alzheimer’s and, when both twins【C12】______ . it, they did so as【C13】______ as 15 years apart. The possibility【C14】______ environment plays a part was【C15】______ by another 1996 study, this time of two groups of elderly Japanese men. One group lived in Hawaii, the other in Japan. The Hawaiian group had a much higher【C16】______ of the disease.
    Aluminum has been blamed for the development of Alzheimer’s. This is because a high level of aluminum has been found in the brains of sufferers. The disease was first diagnosed at the beginning of the 20th century. It was at this time【C17】______ aluminum was becoming widely available for use in cooking pots.
    Memory loss, difficulty in【C18】______ familiar tasks, and problems with abstract thinking are all【C19】______ of the onset of the disease. One unusual feature is its impact on language. It attacks nouns first,【C20】______ verbs. Grammar is one of the last things to go. [br] 【C10】
选项 A、at
B、for
C、by
D、until
答案 C
解析 句意辨析题 by在句中表示“不迟于”。这里要了解succumb的意思，它可指“死亡”，此处指“犯病”，如succumb to a terrible fever。若用at，则比较的是在80岁时死亡的可能性，不合常理。
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